Flat Bottom Drills MDF-L Long Style (External Coolant Supply) Recommended Cutting Conditions
1. A prepared hole with the same diameter is needed for drilling with this tool. 2. A prepared hole with the same diameter is recommended for the cutting conditions.
3. The recommended hole depth is 5 x DC. The depth is measured from the highest point of the hole when drilling in inclined surfaces. 4. This product is a drilling tool. Do not use it for traverse cutting or helical milling. ( v c : Cutting Speed (SFM), f : Feed Rate (IPR)
Dia. DC ( mm )
Cutting Conditions
Mild Steel/General Steel (up to 250HB)
Alloy Steel (up to 300HB)
Hardened Steel (up to 50HRC)
Stainless Steel (up to 200HB)
Gray Cast Iron FC250
Ductile Cast Iron FCD450
Aluminum Alloy 300 - 500
200 - 330
165 - 300
65 - 135
65 - 135
230 - 330
215 - 280
v c
ø4.0
f .0024 - .0039 0.05 - 0.10 .0004 - .0012 .0004 - .0012 .0024 - .0039 .0016 - .0032 .0024 - .0039 ø6.0 v c 200 - 330 165 - 300 65 - 135 65 - 165 230 - 330 215 - 280 300 - 500 f .0020 - .0059 .0020 - .0059 .0016 - .0032 .0012 - .0020 .0020 - .0059 .0024 - .0047 .0020 - .0059 ø8.0 v c 200 - 330 165 - 300 65 - 135 65 - 165 230 - 330 215 - 280 300 - 500 f .0039 - .0079 .0039 - .0079 .0024 - .0039 .0016 - .0032 .0039 - .0079 .0039 - .0059 .0039 - .0079 ø10.0 v c 200 - 330 165 - 300 65 - 135 65 - 165 230 - 330 215 - 280 300 - 500 f .0059 - .0098 .0059 - .0098 .0031 - .0047 .0024 - .0039 .0059 - .0098 .0047 - .0071 .0059 - .0098 ø12.0 v c 200 - 330 165 - 300 65 - 135 65 - 165 230 - 330 215 - 280 300 - 500 f .0079 - .0118 .0079 - .0118 .0047 - .0071 .0032 - .0047 .0067 - .0106 .0059 - .0098 .0079 - .0118 ø16.0 v c 200 - 330 165 - 300 65 - 135 65 - 165 230 - 330 215 - 280 300 - 500 f .0079 - .0118 .0079 - .0118 .0055 - .0079 .0039 - .0079 .0079 - .0118 .0079 - .0118 .0098 - .0138 ø20.0 v c 200 - 330 165 - 300 65 - 135 65 - 165 230 - 330 215 - 280 300 - 500 f .0098 - .0138 .0098 - .0138 .0063 - .0087 .0059 - .0098 .0118 - .0157 .0098 - .0138 .01378 - .0177 Min. - Max.
J
J53
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